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Liquid phase hydrodechlorination of chlorinated aromatics at lower temperature on highly defective Pd sites

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Abstract

Pd catalyst supported on ordered mesoporous silica–carbon nanocomposites (Pd/MSC) was used in hydrodechlorination (HDC) of chlorinated phenol and aromatics at low temperature. Characterization of XRD, XPS, HRTEM and H2-TPD shows Pd nanoparticles of 13.4 nm at nanocrystal joining areas and edge steps on hybrid support of carbon and silica. A large amount of reactive H species exists on Pd/MSC, which exhibits high activity for HDC of chlorinated aromatics at a lower temperature under normal hydrogen pressure. At 258 K, the TOFs for 4-chlorophenol and chlorobenzene are 26.3 and 49.6 min−1, respectively. Using triethylamine as a probe, the HDC of chlorophenols was promoted by reactive H species through the formation of σ-complex of Pd with chlorophenols.

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Acknowledgements

We would like to acknowledge the National Key Research and Development Program of China (No. 2016YFC0204300) and the National Natural Science Foundation of China (Nos. 21477036 and 21777043).

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Authors and Affiliations

  1. Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai, 200237, China

    Xinzheng Li, Zhonghao Jin, Qiguang Dai & Xingyi Wang

  2. Shanghai Research Institute of Petrochemical Technology SINOPEC, 1658 Pudong Beilu, Shanghai, 201208, China

    Zhonghao Jin

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  1. Xinzheng Li
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Correspondence to Xingyi Wang.

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Li, X., Jin, Z., Dai, Q. et al. Liquid phase hydrodechlorination of chlorinated aromatics at lower temperature on highly defective Pd sites. Res Chem Intermed 45, 1087–1104 (2019). https://doi.org/10.1007/s11164-018-3670-z

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